Backup failure, VSS WMI Writer unregistered

Purpose

Re-register WMI Writer in VSS.

Applies To

Exchange

SQL

Windows Server

Symptoms / Description

Backup jobs fail due to the VSS WMI Writer being in a failed state. Run "vssadmin info" at the command prompt on the client and look for the following State and Last Error on the WMI Writer. The VSS WMI Writer may have become unregistered.